var arr = [ 'foo', 'bar'];
var arr = ['foo', 'bar' ];
var arr = [[ 'foo'], 'bar' ];
var arr = [['foo' ], 'bar' ];
var arr = ['foo', 'bar' ];
var [ x, y ] = z;
var [x, y ] = z;
var [x, ...y ] = z;
var [, , x ] = z;
